外研版（2019） 选择性必修第二册 Unit 5 A delicate World Understanding ideas 课件-(27张ppt)
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| 名称 | 外研版（2019） 选择性必修第二册 Unit 5 A delicate World Understanding ideas 课件-(27张ppt) |  | |
| 格式 | pptx | ||
| 文件大小 | 5.6MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2022-10-11 09:20:40 | ||
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(共27张PPT)
Unit5 A delicate world Understanding ideas
高中英语-选择性必修二-模块五-第二课时
新课程
新课程
What animals can you see in the picture
penguin
新课程
一个相关视频展示
新课程
What kind of changes would take place if cats,rats and rabbits were introduced to an environment like this Read the passage and find out what happened to Macquarie island and answer four questions.
新课程
MACQUARIE ISLAND: from Chaos to Conservation
1. I am standing on Macquarie Island, in the Southwest Pacific Ocean, halfway between Australia and Antarctica. Strong winds and stormy seas have helped sculpt its long, thin shape. The green grass and bare rock of its landscape contrast dramatically, giving it a wild and natural beauty. No visitor would think it surprising that the island is a UNESCO World Heritage Site. Nor would they fail to imagine how its native inhabitants, including royal penguins, king penguins, and elephant seals, existed in perfect harmony with their natural habitat for thousands of years.
新课程
Para1.What does the author want to tell us in the first paragraph
A. Macquarie Island has its natural beauty
B. It’s difficult for humans to live on Macquarie Island.
C. Varieties of animals and plants live on Macquarie Island.
D. Macquarie Island’s native inhabitants contrast dramatically with nature.
新课程
2. But the island's more recent history tells a different story. It's a tragic story that began in 1810 when humans arrived on the island. In their ships they unknowingly brought rats and mice. These small animals quickly took over the island, eating the birds' eggs and attacking baby birds. Cats were brought to the island to control the rats and mice. Unfortunately, the cats subsequently developed an appetite for the birds, too.
新课程
Para2:But the island’s more recent history tells a different story.
Please give some factors to explain this sentence.
Humans’ arrival
Rats and mice
Cats
ate the birds’eggs
attacked baby birds
also developed an appetite for the birds
factors
新课程
appetite n 胃口，食欲，喜爱
eg:Her husband always had a huge appetite.
她丈夫向来胃口极大。
have an appetite for 对......有胃口
lose one’s appetite 失去胃口
develop an appetite for 对......产生食欲
新课程
3.Meanwhile, rabbits were introduced to the island as a source of food for humans. Loose on the island, they did what rabbits do best--they multiplied rapidly and began eating the native vegetation and digging holes, which caused soil erosion. The exploding rabbit population provided plentiful food for the cats, meaning that the number of cats also increased. This in turn led to more cats hunting the birds. The end result was that parakeets, once large in number and native to the island, died out in 1891.
新课程
Para3.What do you think was the cause of the extinction of parakeets in 1891
A. The hunters caught the birds for money
B. They couldn't adapt to the environment.
C. The invading animals took over the island
D. The number of cats feeding on them increased.
新课程
4.Even after Macquarie Island became an official nature reserve in the 1970s, the rabbits remained out of control. Experts felt it necessary to come up with a plan to remove all the rabbits from the island. With this goal in mind,a virus was released onto the island. But although the virus caused the rabbit population to decrease from 130, 000 to around 10, 000, it also meant less food for the cats. The cats in consequence turned their attention and their stomachs—back to the native birds, killing up to 60, 000 each year. In the 1980s, traps and dogs were used to catch the cats. The last Macquarie Island cat was caught in 2000.
新课程
Para4: Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
Please list some methods during the 1970s and 1980s.
70s
80s
method: a virus was released.
result: the rabbit population decreased
cats turned attention back to the birds
method: traps and dogs were used
result:the last cat was caught in 2000
新课程
trap n 夹子，陷阱，全套，困境
eg:She set a trap for him and he walked straight into it .
她给他设下圈套，他就径直钻了进去。
trap v (trapped trapped) 设陷阱捕捉;困住；使陷入困境
be trapped in 被困在......中；陷入......中
trap sb into doing sth 诱使某人做某事
eg:They were trapped in the mountain,waiting to be rescued.
他们被困在山中，等待被救援。
新课程
Experts felt it necessary to come up with a plan
to remove all the rabbits from the island.
it:形式宾语
to come up with a plan:不定式做真正的宾语.
to remove all the rabbits from the island:不定式做后置定语，修饰a plan.
翻译：专家认为，必须想办法清除岛上所有的兔子。
新课程
5.But as the saying goes, "While the cat's away, the mice will play."With the departure of the cats from the island, the mouse and rat population started to increase. And remember those 10, 000 or so rabbits It turned out that they developed an immunity to the virus, and their numbers exploded once again. Then, in 2006, the rabbits' digging caused some land to collapse, and killed a substantial number of penguins. This incident made it clear that the rat, mouse and rabbit problem needed solving once and for all.
新课程
Para5.What does the word “their” ( their numbers exploded )in the 5th paragraph refer to
A. Cats'.
B. Parakeets'.
C. Rabbits'.
D. Dogs'.
.
新课程
6.So, I am here on Macquarie Island to participate in the programme to tackle this very problem. The first step involved poison being dropped from helicopters. The next step is to remove the last remaining invading species, and that's where I come in-with my dogs. They have been trained to find every last one, without harming the native animals. This intervention is a long, much-delayed ending to a sad story, but we humans owe it to the island to give it a happy ending.
新课程
Para6:What measures did the author take to solve the problem
3 steps:
dropped poison
dogs
recovery
新课程
to remove...... :不定式短语做表语。
and : 并列连词
where I come......:where引导表语从句.
翻译：下一步是清楚最后残存的入侵物，这就是我的工作了——和我的狗一起
The next step is to remove the last remaining invading species, and that’s where I come in -with my dogs.
新课程
What can be inferred from the text
A. The author's dogs killed the last invading species on the island.
B. The previous methods before 2006 all brought some bad effects.
C. It’s humans’responsibility to bring everything back to normal.
D. The chaos caused on Macquarie Island by humans has recovered.
新课程
Discussion
How could similar situations be avoided in the future
Reference solutions:
To avoid similar situation in the future,we should protect the natural ecosystem and be aware of the potential impact that human activities can have ecosystems.
新课程
Macquarie Island is a UNESCO World Heritage Site. But when humans——(arrive) on the island in 1810, a tragic story began. They took rats and mice with them ——accident and these small animals quickly took over the island, eating the birds' eggs and ——(attack) baby birds. To control the mice and rats, cats——(bring) the island, but they developed an appetite for the birds, too. Meanwhile, ——(rabbit) were introduced to the island as a source of food to feed humans. However, rabbits multiplied and caused soil erosion, and the number of cats—— ate rabbits and birds increased too. To remove all the rabbits from the island, a virus was released onto the island, but the decline of more the rabbits caused cats ——(eat) more native birds. In the 1980s, traps and dogs were used to catch the cats, which caused the number of mice and rats to increase again. Meanwhile, the remaining rabbits—— (develop) an immunity to the virus, and their numbers exploded once again. ——was clear that the rat, mouse and rabbit problem needed ——(solve) once and for all. So I am here to participate in the programme to tackle this problem. But this intervention is along, much-delayed ending to a sad story.
arrived
by
attacking
were brought
rabbits
which
to eat
developed
It
solving
新课程
Summary
单词变形 dramatic adj 巨大而突然的 ________ adv
inhabit vt 居住于 ________ n
subsequent adj 随后的 _________adv
conserve v 保护 保存 ___________n
重点单词 trap n 夹子，陷阱，全套，困境
trap v (trapped trapped) 设陷阱捕捉;困住；使陷入困境
___________________被困在......中；陷入......中
___________________ 诱使某人做某事
appetite n 胃口，食欲，喜爱
__________________ 对......有胃口
__________________失去胃口
___________________对......产生食欲
长难句分析 Experts felt ____ necessary to come up with a plan
to remove all the rabbits from the island.
The next step is to remove the last remaining invading species, _____that’s where I come in -with my dogs.
新课程
Summary
高频短语 owe it to sb to do sth __________
decrease (from) to ___________
in consequence ___________
in harmony with ___________
writing
运用今日所学的单词和短语对本篇文章进行缩写，要求核心突出，层次清晰。
新课程
Summary
单词变形 dramatically
inhabitant
subsequently
conservation
重点单词 be trapped in
trap sb into doing sth
have an appetite for
lose one’s appetite
develop an appetite for
长难句分析 it and
高频短语 应该为某人做某事
从...减少到...
因此，结果
与...和谐，与...一致
新课程
谢谢观看
Unit5 A delicate world Understanding ideas
高中英语-选择性必修二-模块五-第二课时
新课程
新课程
What animals can you see in the picture
penguin
新课程
一个相关视频展示
新课程
What kind of changes would take place if cats,rats and rabbits were introduced to an environment like this Read the passage and find out what happened to Macquarie island and answer four questions.
新课程
MACQUARIE ISLAND: from Chaos to Conservation
1. I am standing on Macquarie Island, in the Southwest Pacific Ocean, halfway between Australia and Antarctica. Strong winds and stormy seas have helped sculpt its long, thin shape. The green grass and bare rock of its landscape contrast dramatically, giving it a wild and natural beauty. No visitor would think it surprising that the island is a UNESCO World Heritage Site. Nor would they fail to imagine how its native inhabitants, including royal penguins, king penguins, and elephant seals, existed in perfect harmony with their natural habitat for thousands of years.
新课程
Para1.What does the author want to tell us in the first paragraph
A. Macquarie Island has its natural beauty
B. It’s difficult for humans to live on Macquarie Island.
C. Varieties of animals and plants live on Macquarie Island.
D. Macquarie Island’s native inhabitants contrast dramatically with nature.
新课程
2. But the island's more recent history tells a different story. It's a tragic story that began in 1810 when humans arrived on the island. In their ships they unknowingly brought rats and mice. These small animals quickly took over the island, eating the birds' eggs and attacking baby birds. Cats were brought to the island to control the rats and mice. Unfortunately, the cats subsequently developed an appetite for the birds, too.
新课程
Para2:But the island’s more recent history tells a different story.
Please give some factors to explain this sentence.
Humans’ arrival
Rats and mice
Cats
ate the birds’eggs
attacked baby birds
also developed an appetite for the birds
factors
新课程
appetite n 胃口，食欲，喜爱
eg:Her husband always had a huge appetite.
她丈夫向来胃口极大。
have an appetite for 对......有胃口
lose one’s appetite 失去胃口
develop an appetite for 对......产生食欲
新课程
3.Meanwhile, rabbits were introduced to the island as a source of food for humans. Loose on the island, they did what rabbits do best--they multiplied rapidly and began eating the native vegetation and digging holes, which caused soil erosion. The exploding rabbit population provided plentiful food for the cats, meaning that the number of cats also increased. This in turn led to more cats hunting the birds. The end result was that parakeets, once large in number and native to the island, died out in 1891.
新课程
Para3.What do you think was the cause of the extinction of parakeets in 1891
A. The hunters caught the birds for money
B. They couldn't adapt to the environment.
C. The invading animals took over the island
D. The number of cats feeding on them increased.
新课程
4.Even after Macquarie Island became an official nature reserve in the 1970s, the rabbits remained out of control. Experts felt it necessary to come up with a plan to remove all the rabbits from the island. With this goal in mind,a virus was released onto the island. But although the virus caused the rabbit population to decrease from 130, 000 to around 10, 000, it also meant less food for the cats. The cats in consequence turned their attention and their stomachs—back to the native birds, killing up to 60, 000 each year. In the 1980s, traps and dogs were used to catch the cats. The last Macquarie Island cat was caught in 2000.
新课程
Para4: Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
Please list some methods during the 1970s and 1980s.
70s
80s
method: a virus was released.
result: the rabbit population decreased
cats turned attention back to the birds
method: traps and dogs were used
result:the last cat was caught in 2000
新课程
trap n 夹子，陷阱，全套，困境
eg:She set a trap for him and he walked straight into it .
她给他设下圈套，他就径直钻了进去。
trap v (trapped trapped) 设陷阱捕捉;困住；使陷入困境
be trapped in 被困在......中；陷入......中
trap sb into doing sth 诱使某人做某事
eg:They were trapped in the mountain,waiting to be rescued.
他们被困在山中，等待被救援。
新课程
Experts felt it necessary to come up with a plan
to remove all the rabbits from the island.
it:形式宾语
to come up with a plan:不定式做真正的宾语.
to remove all the rabbits from the island:不定式做后置定语，修饰a plan.
翻译：专家认为，必须想办法清除岛上所有的兔子。
新课程
5.But as the saying goes, "While the cat's away, the mice will play."With the departure of the cats from the island, the mouse and rat population started to increase. And remember those 10, 000 or so rabbits It turned out that they developed an immunity to the virus, and their numbers exploded once again. Then, in 2006, the rabbits' digging caused some land to collapse, and killed a substantial number of penguins. This incident made it clear that the rat, mouse and rabbit problem needed solving once and for all.
新课程
Para5.What does the word “their” ( their numbers exploded )in the 5th paragraph refer to
A. Cats'.
B. Parakeets'.
C. Rabbits'.
D. Dogs'.
.
新课程
6.So, I am here on Macquarie Island to participate in the programme to tackle this very problem. The first step involved poison being dropped from helicopters. The next step is to remove the last remaining invading species, and that's where I come in-with my dogs. They have been trained to find every last one, without harming the native animals. This intervention is a long, much-delayed ending to a sad story, but we humans owe it to the island to give it a happy ending.
新课程
Para6:What measures did the author take to solve the problem
3 steps:
dropped poison
dogs
recovery
新课程
to remove...... :不定式短语做表语。
and : 并列连词
where I come......:where引导表语从句.
翻译：下一步是清楚最后残存的入侵物，这就是我的工作了——和我的狗一起
The next step is to remove the last remaining invading species, and that’s where I come in -with my dogs.
新课程
What can be inferred from the text
A. The author's dogs killed the last invading species on the island.
B. The previous methods before 2006 all brought some bad effects.
C. It’s humans’responsibility to bring everything back to normal.
D. The chaos caused on Macquarie Island by humans has recovered.
新课程
Discussion
How could similar situations be avoided in the future
Reference solutions:
To avoid similar situation in the future,we should protect the natural ecosystem and be aware of the potential impact that human activities can have ecosystems.
新课程
Macquarie Island is a UNESCO World Heritage Site. But when humans——(arrive) on the island in 1810, a tragic story began. They took rats and mice with them ——accident and these small animals quickly took over the island, eating the birds' eggs and ——(attack) baby birds. To control the mice and rats, cats——(bring) the island, but they developed an appetite for the birds, too. Meanwhile, ——(rabbit) were introduced to the island as a source of food to feed humans. However, rabbits multiplied and caused soil erosion, and the number of cats—— ate rabbits and birds increased too. To remove all the rabbits from the island, a virus was released onto the island, but the decline of more the rabbits caused cats ——(eat) more native birds. In the 1980s, traps and dogs were used to catch the cats, which caused the number of mice and rats to increase again. Meanwhile, the remaining rabbits—— (develop) an immunity to the virus, and their numbers exploded once again. ——was clear that the rat, mouse and rabbit problem needed ——(solve) once and for all. So I am here to participate in the programme to tackle this problem. But this intervention is along, much-delayed ending to a sad story.
arrived
by
attacking
were brought
rabbits
which
to eat
developed
It
solving
新课程
Summary
单词变形 dramatic adj 巨大而突然的 ________ adv
inhabit vt 居住于 ________ n
subsequent adj 随后的 _________adv
conserve v 保护 保存 ___________n
重点单词 trap n 夹子，陷阱，全套，困境
trap v (trapped trapped) 设陷阱捕捉;困住；使陷入困境
___________________被困在......中；陷入......中
___________________ 诱使某人做某事
appetite n 胃口，食欲，喜爱
__________________ 对......有胃口
__________________失去胃口
___________________对......产生食欲
长难句分析 Experts felt ____ necessary to come up with a plan
to remove all the rabbits from the island.
The next step is to remove the last remaining invading species, _____that’s where I come in -with my dogs.
新课程
Summary
高频短语 owe it to sb to do sth __________
decrease (from) to ___________
in consequence ___________
in harmony with ___________
writing
运用今日所学的单词和短语对本篇文章进行缩写，要求核心突出，层次清晰。
新课程
Summary
单词变形 dramatically
inhabitant
subsequently
conservation
重点单词 be trapped in
trap sb into doing sth
have an appetite for
lose one’s appetite
develop an appetite for
长难句分析 it and
高频短语 应该为某人做某事
从...减少到...
因此，结果
与...和谐，与...一致
新课程
谢谢观看